*{
    margin:0;
    padding: 0;
    list-style: none;
    box-sizing: border-box;
}
nav{
    line-height: 90px;
    position: relative;
    z-index: 1000;
}
nav img{
    height: 105px;
    position: absolute;
    left:0;
    top:0;
}
nav li{
    float: left;
    margin: 0 12px;
}
nav li a{
    color: #808080;
}
nav li .yi{
    color: #f17f1f;
}
nav li a:hover{
    color: #f17f1f;
    text-decoration: none;
}
#carouselExampleIndicators{
    margin-bottom: 75px;
}
.header-top{
    text-align: center;
    margin-bottom: 100px;
}
.header-center{
    margin-bottom: 80px;
}
.header-center img{
    width: 100%;
    height: 100%;
}
.header-bottom{
    margin-bottom: 75px;
}
.header-bottom img{
    width: 100%;
    height: 100%;
}
.main-top{
    text-align: center;
    padding-top:55px;
    color: #fcfdff;
    background: #f68a2f;
    margin-bottom: 65px;
}
.main-top .er{
    margin-bottom: 45px;
}
.main-top img{
    margin-top: 25px;
}
.main-center{
    text-align: center;
    margin-bottom: 100px;
}
.main-center .lalala{
    margin-bottom: 45px;
}
.main-center img{
    margin-bottom: 25px;
}
.main-bottom{
    text-align: center;
}
.main-bottom p{
    margin-bottom: 50px;
}
.main-bottom img{
    margin-bottom: 95px;
}
.footer-top{
    background: #2d2d2d;
    color: #ffffff;
    padding: 35px;
}
.footer-top p{
    margin-bottom: 2px;
}
.footer-bottom{
    background: #202020;
    color: #ffffff;
    padding: 40px;
}
.footer-bottom .left{
    float: left;
}
.footer-bottom .right{
    float: right;
}
.footer-bottom .right img{
    margin: 0 7px;
}


/*响应式*/
@media (max-width: 600px) {
    nav img{
        display: none;
    }
    .main-center img{
        width:100%;
        width:100%;
    }
    .main-top img{
        width: 100%;
    }
    .header-center img{
        width:auto;
        height:auto;
    }
    .header-bottom img{
        width:auto;
        height:auto;
    }
    .header-center,.header-bottom{
        text-align: center;
    }
    nav{
        line-height: 45px;
    }
    .footer-bottom{
        padding: 65px;
        height: 200px;
    }
}